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Capacities vs Shortwave

CapacitiesShortwave

Bottom line: Capacities for structured thinkers and PKM enthusiasts; Shortwave for gmail and Google Workspace power users.

An object-based note app that organizes knowledge like your mind

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AI email client for Gmail that helps you reach inbox zero faster with AI search, summaries, and drafting.

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Votes00
PricingFreemiumFreemium
CategoryProductivityProductivity
Tags
pkmobject-based-notessecond-braingraph-viewnote-taking
emailai-emailgmail
Best for
  • Structured thinkers and PKM enthusiasts
  • Individuals building a connected knowledge base
  • Researchers and lifelong learners
  • Gmail and Google Workspace power users
  • Professionals with high email volume
  • Sales, recruiting, and customer-facing teams
Pros
  • Distinctive object-based organization model
  • Graph view visualizes connections
  • Block references link specific content
  • Balances structure with approachability
  • AI assistant summarizes and finds patterns
  • Powerful, genuinely useful AI search and summaries
  • Fast, keyboard-driven interface that feels like a modern successor to Google Inbox
  • Strong inbox organization with bundles, splits, and AI filters
  • Native desktop, iOS, and Android apps
  • Team collaboration features like shared threads and assignees
Cons
  • Object model takes adjustment for new users
  • Primarily individual, limited collaboration
  • No self-hosting
  • AI features are supporting, not central
  • Fewer integrations than mainstream apps
  • Gmail and Google Workspace only, with no Outlook, IMAP, or Exchange support
  • Paid tiers are expensive compared with most email clients
  • Daily AI usage quotas can be hit by heavy users on lower tiers
  • No permanent full-featured free plan beyond the trial and basic use
  • Learning curve for its many organization features

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